I am just like T-block my favorite key of all is Eb. But since coming to LGM and having my rear-end kicked a couple of times by T-block, I have learned to play in Ab, Bb, C, Db, F, Gb, G, B, and of course Eb. I have a few problems playing in the keys of D, A, and E. I can play in those keys, but I'm not very comfortable with them yet.